Compléter les phrases suivantes.
Charles Darwin was a naturalistphysicistalchemist : he studied natural sciences.
He answered the question of the appearanceoriginsize of men.
His theory also concerns the appearanceevolutionage of men.
He changed the way people saw electricityliving speciesastronomy .
He thought that all living species, men included, had the same descendantancestorgene .
He also called natural fightnatural selectionnatural strength the fact that only the strongest survive.
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